1#![feature(box_syntax, box_patterns)]2#![feature(type_alias_impl_trait)]3#![feature(debug_non_exhaustive)]4#![allow(macro_expanded_macro_exports_accessed_by_absolute_paths)]5#![feature(stmt_expr_attributes)]6mod ctx;7mod dynamic;8mod error;9mod evaluate;10mod function;11mod map;12mod obj;13mod val;1415pub use ctx::*;16pub use dynamic::*;17pub use error::*;18pub use evaluate::*;19pub use function::parse_function_call;20use jsonnet_parser::*;21pub use obj::*;22use std::{cell::RefCell, collections::HashMap, fmt::Debug, path::PathBuf, rc::Rc};23pub use val::*;2425rc_fn_helper!(26 Binding,27 binding,28 dyn Fn(Option<ObjValue>, Option<ObjValue>) -> Result<Val>29);3031type BindableFn = dyn Fn(Option<ObjValue>, Option<ObjValue>) -> Result<LazyVal>;32#[derive(Clone)]33pub enum LazyBinding {34 Bindable(Rc<BindableFn>),35 Bound(LazyVal),36}3738impl Debug for LazyBinding {39 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {40 write!(f, "LazyBinding")41 }42}43impl LazyBinding {44 pub fn evaluate(&self, this: Option<ObjValue>, super_obj: Option<ObjValue>) -> Result<LazyVal> {45 match self {46 LazyBinding::Bindable(v) => v(this, super_obj),47 LazyBinding::Bound(v) => Ok(v.clone()),48 }49 }50}5152pub struct EvaluationSettings {53 pub max_stack_frames: usize,54 pub max_stack_trace_size: usize,55 pub import_resolver: Box<dyn Fn(&PathBuf) -> String>,56}57impl Default for EvaluationSettings {58 fn default() -> Self {59 EvaluationSettings {60 max_stack_frames: 200,61 max_stack_trace_size: 20,62 import_resolver: Box::new(|path| {63 panic!("default EvaluationSettings have no support for import resolution, can't import {:?}", path)64 }),65 }66 }67}6869pub struct FileData(String, LocExpr, Option<Val>);70#[derive(Default)]71pub struct EvaluationStateInternals {72 73 stack: RefCell<Vec<StackTraceElement>>,74 75 76 files: RefCell<HashMap<PathBuf, FileData>>,77 globals: RefCell<HashMap<String, Val>>,7879 80 ext_vars: RefCell<HashMap<String, Val>>,8182 settings: EvaluationSettings,83}8485thread_local! {86 87 88 pub(crate) static EVAL_STATE: RefCell<Option<EvaluationState>> = RefCell::new(None)89}90#[inline(always)]91pub(crate) fn with_state<T>(f: impl FnOnce(&EvaluationState) -> T) -> T {92 EVAL_STATE.with(93 #[inline(always)]94 |s| f(s.borrow().as_ref().unwrap()),95 )96}97pub(crate) fn create_error<T>(err: Error) -> Result<T> {98 with_state(|s| s.error(err))99}100#[inline(always)]101pub(crate) fn push<T>(e: LocExpr, comment: String, f: impl FnOnce() -> Result<T>) -> Result<T> {102 with_state(|s| s.push(e, comment, f))103}104105106#[derive(Default, Clone)]107pub struct EvaluationState(Rc<EvaluationStateInternals>);108impl EvaluationState {109 pub fn new(settings: EvaluationSettings) -> Self {110 EvaluationState(Rc::new(EvaluationStateInternals {111 settings,112 ..Default::default()113 }))114 }115 pub fn add_file(&self, name: PathBuf, code: String) -> std::result::Result<(), ParseError> {116 self.0.files.borrow_mut().insert(117 name.clone(),118 FileData(119 code.clone(),120 parse(121 &code,122 &ParserSettings {123 file_name: name,124 loc_data: true,125 },126 )?,127 None,128 ),129 );130131 Ok(())132 }133 pub fn add_parsed_file(134 &self,135 name: PathBuf,136 code: String,137 parsed: LocExpr,138 ) -> std::result::Result<(), ()> {139 self.0140 .files141 .borrow_mut()142 .insert(name, FileData(code, parsed, None));143144 Ok(())145 }146 pub fn get_source(&self, name: &PathBuf) -> Option<String> {147 let ro_map = self.0.files.borrow();148 ro_map.get(name).map(|value| value.0.clone())149 }150 pub fn evaluate_file(&self, name: &PathBuf) -> Result<Val> {151 self.begin_state();152 let value = self.evaluate_file_in_current_state(name)?;153 self.end_state();154 Ok(value)155 }156 pub(crate) fn evaluate_file_in_current_state(&self, name: &PathBuf) -> Result<Val> {157 let expr: LocExpr = {158 let ro_map = self.0.files.borrow();159 let value = ro_map160 .get(name)161 .unwrap_or_else(|| panic!("file not added: {:?}", name));162 if value.2.is_some() {163 return Ok(value.2.clone().unwrap());164 }165 value.1.clone()166 };167 let value = evaluate(self.create_default_context()?, &expr)?;168 {169 self.0170 .files171 .borrow_mut()172 .get_mut(name)173 .unwrap()174 .2175 .replace(value.clone());176 }177 Ok(value)178 }179 pub(crate) fn import_file(&self, path: &PathBuf) -> Result<Val> {180 if !self.0.files.borrow().contains_key(path) {181 let file_str = (self.0.settings.import_resolver)(path);182 self.add_file(path.clone(), file_str).unwrap();183 }184 self.evaluate_file_in_current_state(path)185 }186187 pub fn parse_evaluate_raw(&self, code: &str) -> Result<Val> {188 let parsed = parse(189 &code,190 &ParserSettings {191 file_name: PathBuf::from("raw.jsonnet"),192 loc_data: true,193 },194 )195 .unwrap();196 self.evaluate_raw(parsed)197 }198199 pub fn evaluate_raw(&self, code: LocExpr) -> Result<Val> {200 self.begin_state();201 let value = evaluate(self.create_default_context()?, &code);202 self.end_state();203 value204 }205206 pub fn add_global(&self, name: String, value: Val) {207 self.0.globals.borrow_mut().insert(name, value);208 }209 pub fn add_ext_var(&self, name: String, value: Val) {210 self.0.ext_vars.borrow_mut().insert(name, value);211 }212213 pub fn with_stdlib(&self) -> &Self {214 self.begin_state();215 use jsonnet_stdlib::STDLIB_STR;216 if cfg!(feature = "serialized-stdlib") {217 self.add_parsed_file(218 PathBuf::from("std.jsonnet"),219 STDLIB_STR.to_owned(),220 bincode::deserialize(include_bytes!(concat!(env!("OUT_DIR"), "/stdlib.bincode")))221 .expect("deserialize stdlib"),222 )223 .unwrap();224 } else {225 self.add_file(PathBuf::from("std.jsonnet"), STDLIB_STR.to_owned())226 .unwrap();227 }228 let val = self.evaluate_file(&PathBuf::from("std.jsonnet")).unwrap();229 self.add_global("std".to_owned(), val);230 self.end_state();231 self232 }233234 pub fn create_default_context(&self) -> Result<Context> {235 let globals = self.0.globals.borrow();236 let mut new_bindings: HashMap<String, LazyBinding> = HashMap::new();237 for (name, value) in globals.iter() {238 new_bindings.insert(239 name.clone(),240 LazyBinding::Bound(resolved_lazy_val!(value.clone())),241 );242 }243 Context::new().extend_unbound(new_bindings, None, None, None)244 }245246 #[inline(always)]247 pub fn push<T>(&self, e: LocExpr, comment: String, f: impl FnOnce() -> Result<T>) -> Result<T> {248 {249 let mut stack = self.0.stack.borrow_mut();250 if stack.len() > self.0.settings.max_stack_frames {251 drop(stack);252 return self.error(Error::StackOverflow);253 } else {254 stack.push(StackTraceElement(e, comment));255 }256 }257 let result = f();258 self.0.stack.borrow_mut().pop();259 result260 }261 pub fn print_stack_trace(&self) {262 for e in self.stack_trace().0 {263 println!("{:?} - {:?}", e.0, e.1)264 }265 }266 pub fn stack_trace(&self) -> StackTrace {267 StackTrace(268 self.0269 .stack270 .borrow()271 .iter()272 .rev()273 .take(self.0.settings.max_stack_trace_size)274 .cloned()275 .collect(),276 )277 }278 pub fn error<T>(&self, err: Error) -> Result<T> {279 Err(LocError(err, self.stack_trace()))280 }281282 fn begin_state(&self) {283 EVAL_STATE.with(|v| v.borrow_mut().replace(self.clone()));284 }285 fn end_state(&self) {286 EVAL_STATE.with(|v| v.borrow_mut().take());287 }288}289290#[cfg(test)]291pub mod tests {292 use super::Val;293 use crate::EvaluationState;294 use jsonnet_parser::*;295 use std::path::PathBuf;296297 #[test]298 fn eval_state_stacktrace() {299 let state = EvaluationState::default();300 state301 .push(302 loc_expr!(303 Expr::Num(0.0),304 true,305 (PathBuf::from("test1.jsonnet"), 10, 20)306 ),307 "outer".to_owned(),308 || {309 state.push(310 loc_expr!(311 Expr::Num(0.0),312 true,313 (PathBuf::from("test2.jsonnet"), 30, 40)314 ),315 "inner".to_owned(),316 || {317 state.print_stack_trace();318 Ok(())319 },320 )?;321 Ok(())322 },323 )324 .unwrap();325 }326327 #[test]328 fn eval_state_standard() {329 let state = EvaluationState::default();330 state.with_stdlib();331 assert_eq!(332 state333 .parse_evaluate_raw(r#"std.assertEqual(std.base64("test"), "dGVzdA==")"#)334 .unwrap(),335 Val::Bool(true)336 );337 }338339 macro_rules! eval {340 ($str: expr) => {341 EvaluationState::default()342 .with_stdlib()343 .parse_evaluate_raw($str)344 .unwrap()345 };346 }347 macro_rules! eval_json {348 ($str: expr) => {{349 let evaluator = EvaluationState::default();350 evaluator.with_stdlib();351 let val = evaluator.parse_evaluate_raw($str).unwrap();352 evaluator.add_global("__tmp__to_yaml__".to_owned(), val);353 evaluator354 .parse_evaluate_raw("std.manifestJsonEx(__tmp__to_yaml__, \"\")")355 .unwrap()356 .try_cast_str("there should be json string")357 .unwrap()358 .clone()359 .replace("\n", "")360 }};361 }362363 364 macro_rules! assert_eval {365 ($str: expr) => {366 assert_eq!(eval!($str), Val::Bool(true))367 };368 }369370 371 macro_rules! assert_eval_neg {372 ($str: expr) => {373 assert_eq!(eval!($str), Val::Bool(false))374 };375 }376 macro_rules! assert_json {377 ($str: expr, $out: expr) => {378 assert_eq!(eval_json!($str), $out.replace("\t", ""))379 };380 }381382 383 #[test]384 fn equality_operator() {385 assert_eval!("2 == 2");386 assert_eval_neg!("2 != 2");387 assert_eval!("2 != 3");388 assert_eval_neg!("2 == 3");389 assert_eval!("'Hello' == 'Hello'");390 assert_eval_neg!("'Hello' != 'Hello'");391 assert_eval!("'Hello' != 'World'");392 assert_eval_neg!("'Hello' == 'World'");393 }394395 #[test]396 fn math_evaluation() {397 assert_eval!("2 + 2 * 2 == 6");398 assert_eval!("3 + (2 + 2 * 2) == 9");399 }400401 #[test]402 fn string_concat() {403 assert_eval!("'Hello' + 'World' == 'HelloWorld'");404 assert_eval!("'Hello' * 3 == 'HelloHelloHello'");405 assert_eval!("'Hello' + 'World' * 3 == 'HelloWorldWorldWorld'");406 }407408 #[test]409 fn function_contexts() {410 assert_eval!(411 r#"412 local k = {413 t(name = self.h): [self.h, name],414 h: 3,415 };416 local f = {417 t: k.t(),418 h: 4,419 };420 f.t[0] == f.t[1]421 "#422 );423 }424425 #[test]426 fn local() {427 assert_eval!("local a = 2; local b = 3; a + b == 5");428 assert_eval!("local a = 1, b = a + 1; a + b == 3");429 assert_eval!("local a = 1; local a = 2; a == 2");430 }431432 #[test]433 fn object_lazyness() {434 assert_json!("local a = {a:error 'test'}; {}", r#"{}"#);435 }436437 438 #[test]439 fn object_inheritance() {440 assert_json!("{a: self.b} + {b:3}", r#"{"a": 3,"b": 3}"#);441 }442443 #[test]444 fn test_object() {445 assert_json!("{a:2}", r#"{"a": 2}"#);446 assert_json!("{a:2+2}", r#"{"a": 4}"#);447 assert_json!("{a:2}+{b:2}", r#"{"a": 2,"b": 2}"#);448 assert_json!("{b:3}+{b:2}", r#"{"b": 2}"#);449 assert_json!("{b:3}+{b+:2}", r#"{"b": 5}"#);450 assert_json!("local test='a'; {[test]:2}", r#"{"a": 2}"#);451 assert_json!(452 r#"453 {454 name: "Alice",455 welcome: "Hello " + self.name + "!",456 }457 "#,458 r#"{"name": "Alice","welcome": "Hello Alice!"}"#459 );460 assert_json!(461 r#"462 {463 name: "Alice",464 welcome: "Hello " + self.name + "!",465 } + {466 name: "Bob"467 }468 "#,469 r#"{"name": "Bob","welcome": "Hello Bob!"}"#470 );471 }472473 #[test]474 fn functions() {475 assert_json!(r#"local a = function(b, c = 2) b + c; a(2)"#, "4");476 assert_json!(477 r#"local a = function(b, c = "Dear") b + c + d, d = "World"; a("Hello")"#,478 r#""HelloDearWorld""#479 );480 }481482 #[test]483 fn local_methods() {484 assert_json!(r#"local a(b, c = 2) = b + c; a(2)"#, "4");485 assert_json!(486 r#"local a(b, c = "Dear") = b + c + d, d = "World"; a("Hello")"#,487 r#""HelloDearWorld""#488 );489 }490491 #[test]492 fn object_locals() {493 assert_json!(r#"{local a = 3, b: a}"#, r#"{"b": 3}"#);494 assert_json!(r#"{local a = 3, local c = a, b: c}"#, r#"{"b": 3}"#);495 assert_json!(496 r#"{local a = function (b) {[b]:4}, test: a("test")}"#,497 r#"{"test": {"test": 4}}"#498 );499 }500501 #[test]502 fn direct_self() {503 println!(504 "{:#?}",505 eval!(506 r#"507 {508 local me = self,509 a: 3,510 b(): me.a,511 }512 "#513 )514 );515 }516517 #[test]518 fn indirect_self() {519 520 521 eval!(522 r#"{523 local me = self,524 a: 3,525 b: me.a,526 }.b"#527 );528 }529530 531 #[test]532 fn std_assert_ok() {533 eval!("std.assertEqual(4.5 << 2, 16)");534 }535536 #[test]537 #[should_panic]538 fn std_assert_failure() {539 eval!("std.assertEqual(4.5 << 2, 15)");540 }541542 #[test]543 fn string_is_string() {544 assert_eq!(545 eval!("local arr = 'hello'; (!std.isArray(arr)) && (!std.isString(arr))"),546 Val::Bool(false)547 );548 }549550 #[test]551 fn base64_works() {552 assert_json!(r#"std.base64("test")"#, r#""dGVzdA==""#);553 }554555 #[test]556 fn utf8_chars() {557 assert_json!(558 r#"local c="😎";{c:std.codepoint(c),l:std.length(c)}"#,559 r#"{"c": 128526,"l": 1}"#560 )561 }562563 #[test]564 fn json() {565 assert_json!(566 r#"std.manifestJsonEx({a:3, b:4, c:6},"")"#,567 r#""{\n\"a\": 3,\n\"b\": 4,\n\"c\": 6\n}""#568 );569 }570571 #[test]572 fn test() {573 assert_json!(574 r#"[[a, b] for a in [1,2,3] for b in [4,5,6]]"#,575 "[[1,4],[1,5],[1,6],[2,4],[2,5],[2,6],[3,4],[3,5],[3,6]]"576 );577 }578579 #[test]580 fn sjsonnet() {581 eval!(582 r#"583 local x0 = {k: 1};584 local x1 = {k: x0.k + x0.k};585 local x2 = {k: x1.k + x1.k};586 local x3 = {k: x2.k + x2.k};587 local x4 = {k: x3.k + x3.k};588 local x5 = {k: x4.k + x4.k};589 local x6 = {k: x5.k + x5.k};590 local x7 = {k: x6.k + x6.k};591 local x8 = {k: x7.k + x7.k};592 local x9 = {k: x8.k + x8.k};593 local x10 = {k: x9.k + x9.k};594 local x11 = {k: x10.k + x10.k};595 local x12 = {k: x11.k + x11.k};596 local x13 = {k: x12.k + x12.k};597 local x14 = {k: x13.k + x13.k};598 local x15 = {k: x14.k + x14.k};599 local x16 = {k: x15.k + x15.k};600 local x17 = {k: x16.k + x16.k};601 local x18 = {k: x17.k + x17.k};602 local x19 = {k: x18.k + x18.k};603 local x20 = {k: x19.k + x19.k};604 local x21 = {k: x20.k + x20.k};605 x21.k606 "#607 );608 }609}